



E. V. HARTFORD. v

SHOCK ABSORBER.

APPLICATION FILED NOV.2, 2914.

1,343,970. Patented June 22, 1920.

2 5HEETSSHEET I.

f FI 1. f6

IN V EN TOR.

WITNESSES 9 MPW W E. V. HARTFORD.

SHOCK ABSORBER.

APPLICATiGN man Nov.2.1914.

1,343,970. Patented June 22, 1920.

2 SHEETS-SHEET 2.

WITNESSES.-

A TTOR E YS UNITED STATES PATENT OFFICE.

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"It will he axplainmd that the hub 7 and the Mm. Hath M15118 IMG 1151111 in nacreation of the necessar videtl with outwar housing move relativel to each other, and the iricti'onretarding ements are operably associated in such manner as to efizect the frictional drag or retarding action when t e'hu'b' and housing so move under stress during operation.

The supporting arms are connected to the respective parts ofthe vehicle one to the running 'garand the'o'ther to the chassis, and their nint of connection is of such a construction asto provide againstrattle and noise, in sh o'rt, a ositive :inti-i'attlin' joint. The end-snpporti 'g obn's'tructioh illustrated, is of a. new and novel form embodying features which lend greatly to e'fliciency and economy inconstruction, as well as incest of manufacture. The two-end constructions are alike in cliarticter, and it is thought the description of one will su'flice.

Theoute'ryends of ear h supporting arin are separated by a hub 18, provided with a friction lin'i'n'g or sleeve 19. The sleeve, hub and arm ends are in rigid connection and move to ether. These parts are mounted upon :1 acre 20, which, in turn, is mounted and fixed upon a stud 21, provided with a suppbrting flange or extension '22. The stud 21 is provided with a screw threaded e'xtrer'nit 23, upon which a retaining nut 24 is threat ed, after the parts hiwe been assembled and when sc'rewe'd tight serve to hold them inpro or position between it and the su )porting ange 22. V

in order to seem positively tight antirattling joints at these ends, I interposc between the arms ends and the supporting flange 22 and retaining nut 24:, was er-like disks 25 of friction metal. Against these disks bear washers Q6 of spring metal forzllfid with 151. se'ics of intgrial tzggumlien eiit' 1 am "ere eig. l). tlg parts ave been assembled and the retaining nut Eitiglite'ned to the extent where a positive tight joint is obtained, a. cotter pin 27 is inserted throu h the hole drilled in the stud 21, proper c annals or grooves-28 in the face of the nut bemg providad for its reception. Now referrin' to'Figs. 4 to 8 inclusive I will proceed to es'cribe my 'u'n raved Insane for adjusting or reg'ulatmg t e frictional dra between the retarding elements of the shoi absorber.

Within the housing and cooperatlvcly associated with the housin 1 and the hub 7 are the superimposed at annular ringshaped members 29, which may co'm rise alternate fiber and metal washenlike p ates. These are on held in close association by means of espider ring 80, which is proy-extendmg fingers 30", which'fi bearv'rlth tension u on the up: pet-mo fiietibn inember, throng iwhich'the pressure is distributed to the remaining members. Superimposed on this spider spring, and mounted uponthe hub 7 are two deflectinglplates 31, 32. These plates are provlded wit complemental projections 33, 31- shaped by suitable stampings from the plates themselves. These projections are shown as being three in number on each late, but any number may be em iloycd as cesn'ed. The plate 32 is provided with an aperture 35 for the accommodation of a cam 36 carried by the inside of the housizw cover 3'7, while the plate 31 is provided with a c rcular opening 38 for the reception of :1 ints which is formed integral with the can: 36; The pin 39 and cam 36 are operated froth the exterior by means of a head 4.0, which is located on the outside of the honsin'g. Projecting from this head is a pointer 41 which cooperates with the series of projections 42 which are stamped from the housing cover 37 and are arranged in a series in a dial arrangement. It will be apparent from this, that as the lznoh 40 is rotated, the pin 39 being lodged in the openin 38 of the deflecting plate 31, the latter M1 be held stationary, while the upper ,disk 32 will be caused to more by the on gager'n'ent of the concentric cam 36 and the I opening 35 (see Fig. 6), causing the projev tio'n 84 of the deflecting plate 32 to ride up the incline of the com lements! p'rojcrtion 33, of the deflecting plate 31, thus causing an hicreasin' pressure to be exerted upon the latter. his res-sure, in turn, is transmitted to the spidhnshaped spring 30, with which it conflicts, and through it to the supei'imposed closely associated friction retarding elements. By mrying this movement, more or less pressure can be exerted u on these elements. In order to make this a justment readily and conveniently, l proferably use a key 43, which encircles the knob 40 and is )roi'ided with a pair of lugs 44: which 'stra die the contracted or inner portion of the pointer l1.

While I have illustrated one )reicrrcd embodiment of my invention, I wish to have it understood that I do not wish to he restricted in niattr of details, as the structural arran out and shape of parts may be ehangetl l altered without departing from the spirit and scope of my invention. as defined by the following claims.

Having thus described my invention what I claim as new herein and desire to secure by Letters Patent is:

1. In a shock absorber for spring supported vehicles, a housing for frictional retarding elements, comprising an annular member, a sheet metal arm of two-part or bifurcated construction, embracing said annular member and mountedthereon, sheet metal inclosin caps for said ahnula r member engaging t e ends of said arms and provided wit outwardly directed hub portions, a second sheet metal arm of two-part or bifurcated construction, straddling a portioli of said first arm and the housing, and

means for operably associating the housing and the second arm, so as to permit of their independent relative movement.

2, In a shock absorber for spring supported vehicles, comprisin a housing for the retarding elements, sai housing includ ing an annular inclosing member and sheet metal end apertured ca s, a pair of arms for suspending the shock a sorber in proper position relative to the parts of the vehicle said arms being of two-part or bifurcate construction, one arm being rigidly connected with the annular inclosing member and the other arm being operativel associated with said end caps, and means 'or holding the arms in proper operative position with respect to each-other.

3. In a shockabsorber for spring supported vehicles an annular inclosing member, sheet metal thereof, sheet metal arms associated with said annular inclosing member and said caps, said arms being of two-part or bifurcated'construction and arranged so as to move relatively to each other, and formed to permit one part of one supporting arm to pass between the other of said bifurcated supporting arm. I

4. In a shock absorber for spring suprted vehicles, the combinatiton with a casing for containing frictional retarding elements, a hub mounted within the housingand adapted to be brou ht. into erative relationship with sai retarding of ments, :1 sheet metal bifurcated supporting gm having an enlarged portion forming a ,ahsher rigidly connected with the housing and a sheet metal bifurcated arm in rigid connection with the hub, said arms adapted during normal operation to move in relatively opposite directions, the members of one of said arms being constricted, so as to permit their passage between the parts of said other bifurcated supporting arm when they have been caused to move toward one another.

5. In a shock absorber for spring supported vehicles, a supporting end adapted to be connected to one part of the vehicle, said end comprising a bearing sleeve provided with a friction lining and having seat poi tions for the accommmlation of a supporting arm of two-part construction, washer-like members of frictional material engaging and bearing with spring tension against said bearing sleeve and a stud provided with adjusting means for putting tension or pressure upon the washers for clamping the respective parts in operative relation.

6. In a shock absorber for spring supported vehicles, a housing for the retarding elements comprising an annular member, a sheetmetal arm of two-part or bifurcated caps mounted upon the ends construction, one part provided with a center apertureiand forming a base or support for the retarding'elements, sheet metal I 7. In a shock absorber for spring support ed vehicles, the combination of a lurality of superimposed frictional retar ing elenients, a spring member for holding said elements in close association under pressure, and manuallymperabie means for adjusting the pressure of said spring member to a predetermined dvgree,thc pressure of the spring member remaining constant during the functioning of the device when so adjusted, said means comprising a pair of superimposed deflecting plates having romplemental parts adapted to cooperate to deflect them upon the rotary movement of one of said plates, and means for causing one of said plates to partially rotate, while the other plate remains stationary.

8. In a shock absorber for spring supported vehicles, the combination of a plurality of superimposed friction retard elements, a spider spring bearing upon and holding said members in close association and under pressure, means for regulating said pressure, said means comprising a pair of coiiperating deflecting plates mounted upon the spring, one plate being provided with a cam opening, and the other plate being provided with a circular o mug, and both plates being provided wit deflecting pro'ections, an niclosing plate carrying a stu provided with a cam coliperating with the cam opening of the first-mentioned deflecting plate, said cam, when moved, adapted to move said first-mentioned deflecting plate rotatively with respect to the other do eating plate to increase the pressure on the spring.

9. In a shock absorber for spring supported vehicles, the combination of a pinralit of closely associated superimposed friction retard elements, a spider spring holding said members in close association and under spring pressure, means for regulating the spring pressure of said spider spring, said means comprising a pair of cooperating deflei-ting plates, one plate being plaies said pixies. 

